128075745 has 32 divisors (see below), whose sum is σ = 242277120. Its totient is φ = 56528640.

The previous prime is 128075743. The next prime is 128075747. The reversal of 128075745 is 547570821.

It is an interprime number because it is at equal distance from previous prime (128075743) and next prime (128075747).

It is not a de Polignac number, because 128075745 - 2¹ = 128075743 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128075743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17986 + ... + 24075.

It is an arithmetic number, because the mean of its divisors is an integer number (7571160).

Almost surely, 2^128075745 is an apocalyptic number.

128075745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128075745 is a deficient number, since it is larger than the sum of its proper divisors (114201375).

128075745 is a wasteful number, since it uses less digits than its factorization.

128075745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42105.

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 128075745 is about 11317.0554916020. The cubic root of 128075745 is about 504.0678094389.

The spelling of 128075745 in words is "one hundred twenty-eight million, seventy-five thousand, seven hundred forty-five".